Bowling-pin.



Patented May 9,1916.

M. J. WHELAN.

BOWLING PIN.

APPLICATION FILED DEC. 20, 1915.

human snares rx rnnr orrren MICHAEL JAMES WHELAN, 0F IILUSKEGON,MICHIGAN, ASSIGNOR TO THE BRUNSWICK BALKE-COLLENZDER CGMPANY, OFCHICAGO, ILLINOIS, A. CORPORATION OF DELA- BOWLING-PIN.

Specification of Letters Patent.

Patented May 9, rate,

To all whom it may concern:

Be it known that l,- MIGEAEL J. WHELAN, a citizen of the United States,residing at Muskegon, in the county of Muskegon and State of Michigan,have, invented certaln new and useful lmproyements in Bowlmg- Pins, ofwhich the following is a specification.

This invention relates to bowling pins.

Bowling pins are at present usually constructed of maple, an extremelyexpensive wood, the supply of which is rapidly becoming more limited,and it is desirable to provide a substitute therefor which is equal orsuperior to maple in withstanding the rough usage to which bowling pinsare subjected.

It is the object, therefore, of my invention to provide a durable andrelatively inexpensive bowling pin constructed of a compositioncomprising a rubber compound having fibrous material thoroughlyincorporated therewith,

Further objects and advantages of my invention will be apparent as it isbetter under stood by reference to the following specification when readin connection with the accompanying drawing illustrating the pre-:terred embodiment thereof in which Figure 1 is a side elevationpartially in section, of a bowling pin, an Fig. 2 is a horizontalsection on the line 2-2 of Fig. l somewhat enlarged.

Referring to the drawing, 1 indicates a pin of standard size and form,the body of which consists ot a hard rubber compound, indicated at 2,having fibrous material 3 thoroughly incorporated therewith.

The rubber compound employed clude the usual ingredients of suchcompounds as well-known in the art, such as gum rubber and sulfur, andthe fibrous material preferably consists of wood shavings, ground orshredded wood, sticks or slivers, the proportions of the ingredientsvarying from 15% to 85% by weight of rubber compound and from 85% to 15%by weight of fibrous material if have found by expert ment that the mostdesirable proportions are approximately 85% by weight of fibrousmaterial and 15% by weight of rubber compound. l-lard wood shavings fromplaners form an extremely desirable material for use in thecomposition.

To produce the composition 1 first work may inthe rubber in a suitablerubber mixer of well-known form and construction to a conslstencysimilar to that of molasses candy when ready to pull. The rolls of therubber mixer are then separated until they are approxlmately one-fourthof an inch apart and the shavings and other fibrous material are added,the mixture being worked until the ingredients are thoroughly mixed, sothat the fibrous material is uniformly coated with the rubber compoundThe mass is then removed from the mixer and packed in molds of desiredfornnsubjected to pressure to compact the mass and vulcanized in theusual manner under pressure.

The resulting composition is hard, dense and neither flexible norbrittle and is, therefore, exceedingly durable. It can be sawed,machined, tooled, buffed and will receive a high polish. The compositionis of such a character that wood screws can be employed without tappingand the material can be tapped to receive machine screws.

Thepin l is formed from the above-described composition either bymolding the composition in suitable molds shaped in accordance with theproportions of standard bowling pins, after which the mass is vulcanizedin the mold under pressure or, if desired, suitable blanks maybe moldedin a similar manner and subsequently turned in a lathe to the desiredform,

Various changes maybe made in the form of the pin illustrated as well asin the proportionsand components of the composition without departingfrom the spirit and scope of the invention as defined in theaccompanying claims, the description covering merely the preferredembodiments of the invention.

I claim:

1. As a new article of manufacture, a bowling pin, the body of whichconsists of a composition of hard vulcanized rubber having fibrousmaterial thoroughly incorporated therewith.

2. As a new article of manufacture, a bowling pin, the body of whichconsists of a composition of hard vulcanized rubber having wood shavingsthoroughly incorporated therewith.

'3. As a new article of manufacture, a bowling pin, the body of whichconsists of a composition of hard vulcanized rubber, and

wood shavings in substantially the propor Wood shavingsdn substantiallythe probortions of 15% or more by Weight of hard ru'btions of 15% byWeight of hard rubber comber compound and 85% or less by weight of poundand 85% by weight of Wood shavings. 10

fibrous material. MICHAEL JAMES WI-IELAN. 5 4. As a new article ofmanufacture, a Witnesses:

bowling pin, the body of which consists of a CLARENCE J. AHUs'rRoM,

composition of hard vulcanized rubber and F. J. LoEWE.

